Performance of TOA and TDOA in a Non-homogeneous Transmitter Network Combining GPS and Terrestrial Signals

J-Y. Do, M. Rabinowitz, and P. Enge

Abstract:	The time of arrival (TOA) and the time difference of arrival (TDOA) measurements are transformable to each other without a loss of information regarding positioning and thus the position estimations based on them should be theoretically equivalent. It is proved by Shin [1] in case of homogeneous and uncorrelated ranging sources with the weighted least square (WLS) method. In this paper, their equivalence is proved in a general case and examined under various practical scenarios including non-homogeneous and correlated ranging sources and suboptimal weighting methods such as the least square (LS) by simulation.
Published in:	Proceedings of the 2006 National Technical Meeting of The Institute of Navigation January 18 - 20, 2006 Hyatt Regency Hotel Monterey, CA
Pages:	642 - 649
Cite this article:	Do, J-Y., Rabinowitz, M., Enge, P., "Performance of TOA and TDOA in a Non-homogeneous Transmitter Network Combining GPS and Terrestrial Signals," Proceedings of the 2006 National Technical Meeting of The Institute of Navigation, Monterey, CA, January 2006, pp. 642-649.
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